Added `project/metals.sbt` to ignore list.
Added `project/metals.sbt` to ignore list.

transcendent-ai-labs/DynaML,transcendent-ai-labs/DynaML,transcendent-ai-labs/DynaML,mandar2812/DynaML,transcendent-ai-labs/DynaML,transcendent-ai-labs/DynaML,mandar2812/DynaML